Ok I Juss finished up head gasket and injector job. Got the motor back in, and I go to the part store to get a ac accumulator cuz I had the system open for awhile, and they have two different ones, one with a p-nut fitting clocked at 2:00 and one at 7:00. Now I'm pretty good with ac but my question is what is a p-nut fitting on the accumulator lol. They have to order either one so I can't compare. Thanks for any help.